Slow Cooker Baked Ziti

Baked ziti is the kind of dish that satisfies a particular craving — cheesy, saucy, rich Italian-American comfort food that feeds a crowd from a single pan and reliably makes people happy. The traditional version involves boiling pasta, browning meat, assembling layers in a baking dish, and running the oven for the better part of an hour. This slow cooker version achieves the same result with considerably less active involvement: the uncooked pasta goes straight into the crockpot in layers with the meat, sauce, and cheese, and by the time the cook is done the ziti is tender, the cheeses are melted through, and the marinara has thickened into a clingy, savory sauce around every piece of pasta.

The layering method is what makes this work. Building the ziti, meat, sauce, and cheese in two distinct layers — rather than stirring everything together — produces a dish with the same structured quality as the oven version, with distinct pockets of ricotta, stretchy mozzarella throughout, and a Parmesan-dusted top that takes on a slightly set, almost baked quality by the end of the cooking time. It’s not identical to the oven original, but it’s genuinely excellent in its own right and far more convenient for a weeknight when the oven is in use or simply off the table.

Why You’ll Love This Recipe

The central appeal is simplicity of effort relative to the quality of the result. Browning the meat takes about ten minutes; assembly into the slow cooker takes another five. Everything after that happens unattended. The slow cooker’s enclosed, moist environment cooks the pasta directly in the sauce as it heats, which means the ziti absorbs the tomato and meat flavors throughout rather than just being coated on the surface — in some ways a more flavorful outcome than the oven version where the pasta is pre-cooked in plain salted water.

This is also one of the most naturally crowd-pleasing dinners available from a slow cooker. The flavor profile — Italian sausage or ground beef, rich marinara, ricotta, mozzarella, Parmesan — is broadly appealing and familiar. There’s nothing challenging about it, it feeds six to eight people generously, it’s a good potluck dish that travels well in the insert, and the leftovers reheat reliably for the next day’s lunch. It checks every box that a reliable weeknight or weekend family dinner needs to check.

Ingredient Notes

Ziti pasta — one pound, uncooked — is the traditional pasta for this dish and the right choice here. Ziti is a smooth, hollow tube shape that cooks well in the slow cooker’s moist heat and holds up through the cooking time without becoming mushy, provided it’s added dry and the total cooking time isn’t exceeded. Penne rigate is an excellent and widely available substitute — the ridges hold the sauce slightly better than smooth ziti, and the similar size and thickness means cooking time is essentially identical. Rigatoni, with its wider tube and ridged exterior, also works well and produces a slightly more textured, substantial result. Avoid thin or delicate pasta shapes that cook too quickly and become soft before the sauce is fully developed.

Ground beef or Italian sausage — one pound — provides the protein and much of the dish’s savory depth. The choice between the two produces noticeably different results. Ground beef (80/20) produces a straightforward, clean-tasting meat layer that lets the marinara and cheese take center stage. Italian sausage — either sweet or hot, depending on your preference — contributes a much more complex flavor from the fennel, garlic, red pepper, and other seasonings in the sausage mix, producing a dish that tastes more robustly seasoned and distinctively Italian-American. If you use Italian sausage, taste the browned meat before adding additional salt and Italian seasoning, as the sausage is already well-seasoned and may not need much. A combination of half ground beef and half Italian sausage is a particularly good option that provides both the meatier body of ground beef and the complex spiced flavor of the sausage.

Onion and garlic — one small diced onion and two minced cloves — are cooked with the meat in the browning step, softening and sweating into the fat as the meat browns. Both are fundamental aromatics for any Italian-style meat sauce; the onion provides sweetness and body and the garlic provides the background savory depth that the dish would taste flat without. Soften both fully before the meat is fully browned so they have time to turn translucent and mellow rather than remaining raw and sharp in the finished dish.

Marinara sauce — one 24-ounce jar — provides the primary tomato base. A good-quality marinara is worth using here because its flavor is directly perceptible in every bite of the finished dish. Simple, tomato-forward marinara without a lot of added sweeteners or thickeners produces the best result. Homemade marinara is excellent if you have it. The marinara combines with the crushed tomatoes to provide enough total sauce volume to cook the pasta and produce a sufficiently saucy finished dish.

Crushed tomatoes — one 14-ounce can — extends the sauce and adds a slightly more textured, fresh-tomato quality to the flavor alongside the cooked-down marinara. The combination of jarred marinara (which is sweeter and more complex from its cooking process) and canned crushed tomatoes (which are brighter and more tart) produces a more layered, interesting tomato flavor than either alone. Diced tomatoes can be substituted if crushed aren’t available, though the texture will be slightly more chunky.

Water or beef broth — one cup — is poured over the assembled layers before cooking. This liquid is the most important element for getting the uncooked pasta to cook properly in the slow cooker. The pasta needs more liquid than is present in the sauce alone to hydrate and soften during the cook. Beef broth produces a slightly deeper, more savory result than water; either is appropriate. Don’t be tempted to reduce this quantity — if the pasta doesn’t have enough liquid contact, the top layer of ziti will remain crunchy and undercooked while the bottom layers are done.

Ricotta cheese — 1½ cups — is the creamy, mild component that creates the characteristic pockets of white cheese that make baked ziti visually distinctive and texturally varied. Whole-milk ricotta produces the creamiest, most luxurious result and holds its texture better during the cook than part-skim. Dollop it in spoonfuls rather than spreading it in a uniform layer, so it creates distinct creamy pockets throughout the pasta rather than a uniform layer that blends invisibly into the sauce. A tablespoon or two of cream or a beaten egg mixed into the ricotta before assembly makes it slightly richer and helps it hold together better during the long cook.

Mozzarella and Parmesan provide the melted, stretchy, and sharp cheesy elements respectively. Two cups of shredded mozzarella is enough to create a generously cheesy dish throughout both layers. Freshly shredded mozzarella from a block melts more smoothly and stringily than pre-shredded, which contains anti-caking starch that can make the melt slightly grainy. Half a cup of grated Parmesan adds saltiness and a sharp, nutty depth that mozzarella alone doesn’t provide.

Ingredients

• 1 lb ziti pasta, uncooked
• 1 lb ground beef or Italian sausage (sweet or hot)
• 1 small onion, diced
• 2 cloves garlic, minced
• 1 jar (24 oz) marinara sauce
• 1 can (14 oz) crushed tomatoes
• 1 cup water or beef broth
• 1 tsp Italian seasoning
• Salt and black pepper, to taste
• 1½ cups whole-milk ricotta cheese
• 2 cups shredded mozzarella cheese, divided
• ½ cup grated Parmesan cheese, divided
• Fresh basil or flat-leaf parsley, for garnish (optional)